<template>
  <div class="slider-custom">
    <ul class="slider" ref="slider">
      <li
        class="item"
        v-for="(item, index) in items"
        :key="index"
        :style="{ backgroundImage: `url(${item.image})`, ...getItemStyle(index) }"
      >
        <div class="content" v-if="index == currentIndex">
          <h2 class="title">{{ item.title }}</h2>
          <p class="description">{{ item.description }}</p>
          <button>Read More</button>
        </div>
      </li>
    </ul>
    <nav class="nav">
      <div class="btn prev" name="arrow-back-outline" @click="prev">prev</div>
      <div class="btn next" name="arrow-forward-outline" @click="next">next</div>
    </nav>
  </div>
</template>

<script setup>
import { ref } from 'vue'

const items = ref([
  {
    title: 'Lossless Youths',
    description: 'Lorem ipsum...',
    image: 'https://free2.yunpng.top/2024/10/08/6704fc5ec643f.png'
  },
  {
    title: 'Estrange Bond',
    description: 'Lorem ipsum...',
    image: 'https://free2.yunpng.top/2024/10/08/6704fc5f059b6.png'
  },
  {
    title: 'The Gate Keeper',
    description: 'Lorem ipsum...',
    image: 'https://free2.yunpng.top/2024/10/08/6704fc61032d0.png'
  },
  {
    title: 'Last Trace Of Us',
    description: 'Lorem ipsum...',
    image: 'https://free2.yunpng.top/2024/10/08/6704fc8cdbe22.png'
  },
  {
    title: 'Urban Decay',
    description: 'Lorem ipsum...',
    image: 'https://free2.yunpng.top/2024/10/08/6704fc8d09b1b.png'
  },
  {
    title: 'The Migration',
    description: 'Lorem ipsum...',
    image: 'https://free2.yunpng.top/2024/10/08/6704fc8e84917.png'
  }
])

const currentIndex = ref(0)

const getItemStyle = (i) => {
  const style = {
    position: 'absolute',
    // transform: 'translateY(-50%)',
    zIndex: 1,
    backgroundPosition: 'center',
    backgroundSize: 'cover',
    borderRadius: '20px',
    boxShadow: '0 20px 30px rgba(255, 255, 255, 0.3) inset',
    transition: 'transform 0.1s, left 0.75s, top 0.75s, width 0.75s, height 0.75s',
    top: '0'
  }

  if (i < 3) {
    style.left = '0'
    style.width = '100%'
    style.height = '100%'
    style.transform = 'none'
    style.borderRadius = '0'
    style.boxShadow = 'none'
    style.opacity = '1'
  } else {
    style.left = `calc(50% + ${(i - 3) * 220}px)`
    style.opacity = i === items.value.length - 1 ? '0' : '1'
    style.top = '50%'
  }

  return style
}

const next = () => {
  items.value.push(items.value.shift())
}

const prev = () => {
  items.value.unshift(items.value.pop())
}
</script>

<style lang="less" scoped>
.slider-custom {
  position: relative;
  width: 100%;
  height: 100%;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
}

.item {
  width: 200px;
  height: 300px;
  list-style-type: none;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
  background-position: center;
  background-size: cover;
  border-radius: 20px;
  box-shadow: 0 20px 30px rgba(255, 255, 255, 0.3) inset;
  transition:
    transform 0.1s,
    left 0.75s,
    top 0.75s,
    width 0.75s,
    height 0.75s;

  &:nth-child(1),
  &:nth-child(2) {
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    transform: none;
    border-radius: 0;
    box-shadow: none;
    opacity: 1;
  }
  &:nth-child(3) {
    left: 50%;
  }
  &:nth-child(4) {
    left: calc(50% + 220px);
  }
  &:nth-child(5) {
    left: calc(50% + 440px);
  }
  &:nth-child(6) {
    left: calc(50% + 660px);
    opacity: 0;
  }
}

.content {
  width: min(30vw, 400px);
  position: absolute;
  top: 50%;
  left: 3rem;
  transform: translateY(-50%);
  font:
    400 0.85rem helvetica,
    sans-serif;
  color: white;
  text-shadow: 0 3px 8px rgba(0, 0, 0, 0.5);
  opacity: 0;
  display: none;

  & .title {
    font-family: 'arial-black';
    text-transform: uppercase;
  }

  & .description {
    line-height: 1.7;
    margin: 1rem 0 1.5rem;
    font-size: 0.8rem;
  }

  & button {
    width: fit-content;
    background-color: rgba(0, 0, 0, 0.1);
    color: white;
    border: 2px solid white;
    border-radius: 0.25rem;
    padding: 0.75rem;
    cursor: pointer;
  }
}

.item:nth-of-type(2) .content {
  display: block;
  animation: show 0.75s ease-in-out 0.3s forwards;
}

@keyframes show {
  0% {
    filter: blur(5px);
    transform: translateY(calc(-50% + 75px));
  }
  100% {
    opacity: 1;
    filter: blur(0);
  }
}

.nav {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  user-select: none;

  & .btn {
    background-color: rgba(255, 255, 255, 0.5);
    color: rgba(0, 0, 0, 0.7);
    border: 2px solid rgba(0, 0, 0, 0.6);
    margin: 0 0.25rem;
    padding: 0.75rem;
    border-radius: 50%;
    cursor: pointer;

    &:hover {
      background-color: rgba(255, 255, 255, 0.3);
    }
  }
}

@media (width > 650px) and (width < 900px) {
  .content {
    & .title {
      font-size: 1rem;
    }
    & .description {
      font-size: 0.7rem;
    }
    & button {
      font-size: 0.7rem;
    }
  }
  .item {
    width: 160px;
    height: 270px;

    &:nth-child(3) {
      left: 50%;
    }
    &:nth-child(4) {
      left: calc(50% + 170px);
    }
    &:nth-child(5) {
      left: calc(50% + 340px);
    }
    &:nth-child(6) {
      left: calc(50% + 510px);
      opacity: 0;
    }
  }
}

@media (width < 650px) {
  .content {
    & .title {
      font-size: 0.9rem;
    }
    & .description {
      font-size: 0.65rem;
    }
    & button {
      font-size: 0.7rem;
    }
  }
  .item {
    width: 130px;
    height: 220px;

    &:nth-child(3) {
      left: 50%;
    }
    &:nth-child(4) {
      left: calc(50% + 140px);
    }
    &:nth-child(5) {
      left: calc(50% + 280px);
    }
    &:nth-child(6) {
      left: calc(50% + 420px);
      opacity: 0;
    }
  }
}
</style>
